The Cosmic Origins Spectrograph: On-Orbit Instrument Performance
S. Osterman, J. Green, C. Froning, S. B\'eland, E. Burgh, K. France,, S.Penton, T. Delker, D. Ebbets, D. Sahnow, J. Bacinski, R. Kimble, J., Andrews, E. Wilkinson, J. McPhate, O. Siegmund, T. Ake, A. Aloisi, C., Biagetti, R. Diaz, W. Dixon, S. Friedman, P. Ghavamian
TL;DR
This paper details the design, installation, and performance verification of the Cosmic Origins Spectrograph on the Hubble Space Telescope, highlighting its high sensitivity and operational status in ultraviolet spectroscopy.
Contribution
It provides the first comprehensive on-orbit performance assessment of COS, including design details and verification results post-installation.
Findings
COS is the most sensitive FUV/NUV spectrograph flown to date
Peak effective area approaches 3000 cm^2
Instrument performance meets mission specifications
Abstract
The Cosmic Origins Spectrograph (COS) was installed in the Hubble Space Telescope in May, 2009 as part of Servicing Mission 4 to provide high sensitivity, medium and low resolution spectroscopy at far- and near-ultraviolet wavelengths (FUV, NUV). COS is the most sensitive FUV/NUV spectrograph flown to date, spanning the wavelength range from 900{\AA} to 3200{\AA} with peak effective area approaching 3000 cm^2. This paper describes instrument design, the results of the Servicing Mission Orbital Verification (SMOV), and the ongoing performance monitoring program.
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